On most platforms, only the first two or three lines show before a "read more" button appears, so if those lines do not grab attention, most people scroll past. That said, longer captions can work well when the topic is interesting enough to make people want to keep reading, especially on platforms like LinkedIn or Facebook. Short captions tend to work better for quick entertainment content, while longer ones suit stories, explanations, or emotional posts. Does caption length actually change how people engage with a post, or does the content itself matter more?